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US 2019/0316423 A1Published application
Methods and systems for viv suppression utilizing retractable fins
AssigneeCBM International, Inc.
InventorShan Shi
Life of this patent
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Abstract
Embodiments disclosed herein describe cylindrical structures with indents configured to reduce vortex induced vibrations (VIV). For example, the cylindrical structures may be configured to reduce VIV for risers subject to ocean currents.
Claims20
A cylindrical structure configured to reduce vortex induced vibrations comprising:
- a notch positioned within the cylindrical structure;
- a fin configured to rotate within the notch, the fin including a first surface and a second surface, wherein in a first mode the first surface is positioned against a first sidewall of the notch, and in a second mode the first surface is positioned away from the first surface of the notch.
A method for using cylindrical structure configured to reduce vortex induced vibrations comprising:
- positioning a fin within a notch in the cylindrical structure;
- positioning a first surface of the fin against a first sidewall of the notch in a first mode;
- rotating the fin within the notch;
- positioning the first surface away from the first sidewall of the notch in a second mode.
1 more element
Dependencies are inferred from the claim text.